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Finding the Fourth Proportional to 1,247,739.89, 1,721,886.24 and 674,780.06

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Solution

The fourth proportional to 1,247,739.89, 1,721,886.24 and 674,780.06 is: 931,199.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,739.89 : 1,721,886.24 = 674,780.06 : x
  2. Step 2: Convert to fraction form
    1,247,739.89/1,721,886.24 = 674,780.06/x
  3. Step 3: Cross multiply
    1,247,739.89x = 1,721,886.24 × 674,780.06
  4. Step 4: Simplify right side
    1,247,739.89x = 1,161,894,496,966.47
  5. Step 5: Solve for x
    x = 1,161,894,496,966.47/1,247,739.89
  6. Step 6: Final answer
    x = 931,199.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.